| 1 | /// <reference lib="dom" /> |
| 2 | |
| 3 | // Page-side helpers compiled into the standalone browser-page resource. |
| 4 | |
| 5 | export interface RefInput { |
| 6 | key: string; |
| 7 | snapshotId: string; |
| 8 | docId: string; |
| 9 | ref: string; |
| 10 | } |
| 11 | |
| 12 | export interface ResolveInput extends RefInput { |
| 13 | scroll: boolean; |
| 14 | localCoordinates?: boolean; |
| 15 | } |
| 16 | |
| 17 | export interface ResolvedElement { |
| 18 | ok: true; |
| 19 | x: number; |
| 20 | y: number; |
| 21 | width: number; |
| 22 | height: number; |
| 23 | tag: string; |
| 24 | type: string; |
| 25 | disabled: boolean; |
| 26 | editable: boolean; |
| 27 | frameOffsetKnown: boolean; |
| 28 | } |
| 29 | |
| 30 | export interface ResolveFailure { |
| 31 | ok: false; |
| 32 | reason: string; |
| 33 | } |
| 34 | |
| 35 | export type ResolveOutput = ResolvedElement | ResolveFailure; |
| 36 | |
| 37 | interface Registry { |
| 38 | docId: string; |
| 39 | snapshotId: string; |
| 40 | refs: Map<string, Element>; |
| 41 | } |
| 42 | |
| 43 | // scroll:true brings the element to the viewport centre first; the returned |
| 44 | // rect is in top-document CSS pixels when every enclosing frame is |
| 45 | // same-origin, otherwise frameOffsetKnown is false and the caller refuses. |
| 46 | export function pageResolve(input: ResolveInput): ResolveOutput { |
| 47 | const registry = (window as unknown as Record<string, unknown>)[input.key] as Registry | undefined; |
| 48 | if (!registry || registry.docId !== input.docId || registry.snapshotId !== input.snapshotId) return { ok: false, reason: "stale" }; |
| 49 | const el = registry.refs.get(input.ref); |
| 50 | if (!el) return { ok: false, reason: "stale" }; |
| 51 | if (!el.isConnected) return { ok: false, reason: "element is no longer in the document" }; |
| 52 | const style = window.getComputedStyle(el); |
| 53 | if (style.display === "none" || style.visibility === "hidden") return { ok: false, reason: "element is hidden" }; |
| 54 | if (input.scroll) { |
| 55 | try { |
| 56 | el.scrollIntoView({ block: "center", inline: "center" }); |
| 57 | } catch { |
| 58 | // Detached or non-scrollable ancestors; the rect check below decides. |
| 59 | } |
| 60 | } |
| 61 | const rect = el.getBoundingClientRect(); |
| 62 | if (rect.width === 0 || rect.height === 0) return { ok: false, reason: "element has no size" }; |
| 63 | const cx = rect.left + rect.width / 2; |
| 64 | const cy = rect.top + rect.height / 2; |
| 65 | if (cx < 0 || cy < 0 || cx > window.innerWidth || cy > window.innerHeight) return { ok: false, reason: "element is outside the viewport" }; |
| 66 | if (el.tagName !== "OPTION") { |
| 67 | const hit = document.elementFromPoint(cx, cy); |
| 68 | if (hit && hit !== el && !el.contains(hit) && !hit.contains(el)) return { ok: false, reason: "element is covered by another element" }; |
| 69 | } |
| 70 | let dx = 0; |
| 71 | let dy = 0; |
| 72 | let frameOffsetKnown = true; |
| 73 | try { |
| 74 | let win: Window = window; |
| 75 | while (!input.localCoordinates && win !== win.top) { |
| 76 | const owner = win.frameElement; |
| 77 | if (!owner) { |
| 78 | frameOffsetKnown = false; |
| 79 | break; |
| 80 | } |
| 81 | const ownerRect = owner.getBoundingClientRect(); |
| 82 | dx += ownerRect.left + owner.clientLeft; |
| 83 | dy += ownerRect.top + owner.clientTop; |
| 84 | win = win.parent; |
| 85 | } |
| 86 | } catch { |
| 87 | frameOffsetKnown = false; |
| 88 | } |
| 89 | const tag = el.tagName.toLowerCase(); |
| 90 | const type = tag === "input" ? (el as HTMLInputElement).type.toLowerCase() : ""; |
| 91 | const editable = tag === "textarea" || (el as HTMLElement).isContentEditable || (tag === "input" && !["button", "submit", "reset", "image", "checkbox", "radio", "file", "range", "color"].includes(type)); |
| 92 | return { |
| 93 | ok: true, |
| 94 | x: rect.left + dx, |
| 95 | y: rect.top + dy, |
| 96 | width: rect.width, |
| 97 | height: rect.height, |
| 98 | tag, |
| 99 | type, |
| 100 | disabled: (el as HTMLButtonElement).disabled === true, |
| 101 | editable, |
| 102 | frameOffsetKnown, |
| 103 | }; |
| 104 | } |
| 105 | |
| 106 | // Executed in each parent isolated world. WindowProxy identity is readable |
| 107 | // across origins, while the parent alone supplies the frame owner's geometry. |
| 108 | export function pageFrameGeometry(input: { index: number; x: number; y: number; scroll: boolean }) { |
| 109 | const target = window.frames[input.index]; |
| 110 | const find = (root: Document | ShadowRoot): HTMLElement | undefined => { |
| 111 | for (const el of root.querySelectorAll("*")) { |
| 112 | if ((el instanceof HTMLIFrameElement || el instanceof HTMLFrameElement) && el.contentWindow === target) return el; |
| 113 | if (el.shadowRoot) { const nested = find(el.shadowRoot); if (nested) return nested; } |
| 114 | } |
| 115 | }; |
| 116 | const owner = find(document); |
| 117 | if (!owner) return null; |
| 118 | if (input.scroll) owner.scrollIntoView({ block: "center", inline: "center" }); |
| 119 | const style = getComputedStyle(owner); |
| 120 | const transform = style.transform === "none" ? null : new DOMMatrixReadOnly(style.transform); |
| 121 | if (transform && (transform.b !== 0 || transform.c !== 0 || transform.a <= 0 || transform.d <= 0)) return null; |
| 122 | const rect = owner.getBoundingClientRect(); |
| 123 | if (!owner.offsetWidth || !owner.offsetHeight) return null; |
| 124 | const scaleX = rect.width / owner.offsetWidth, scaleY = rect.height / owner.offsetHeight; |
| 125 | const x = rect.left + (owner.clientLeft + input.x) * scaleX, y = rect.top + (owner.clientTop + input.y) * scaleY; |
| 126 | const hit = owner.getRootNode() instanceof ShadowRoot ? (owner.getRootNode() as ShadowRoot).elementFromPoint(x, y) : document.elementFromPoint(x, y); |
| 127 | if (x < 0 || y < 0 || x >= innerWidth || y >= innerHeight || hit !== owner) return null; |
| 128 | return { x, y, scaleX, scaleY }; |
| 129 | } |
| 130 | |
| 131 | export interface SelectInput extends RefInput { |
| 132 | options: string[]; |
| 133 | } |
| 134 | |
| 135 | export type SelectOutput = { ok: true; selected: string[] } | ResolveFailure; |
| 136 | |
| 137 | // The one action that synthesises DOM events: a <select> has no trustworthy |
| 138 | // pointer path (its popup is native), so options are toggled directly and |
| 139 | // input/change are dispatched the way Chromium itself does after a pick. |
| 140 | export function pageSelect(input: SelectInput): SelectOutput { |
| 141 | const registry = (window as unknown as Record<string, unknown>)[input.key] as Registry | undefined; |
| 142 | if (!registry || registry.docId !== input.docId || registry.snapshotId !== input.snapshotId) return { ok: false, reason: "stale" }; |
| 143 | const target = registry.refs.get(input.ref); |
| 144 | if (!target) return { ok: false, reason: "stale" }; |
| 145 | const select = target.tagName === "SELECT" ? (target as HTMLSelectElement) : target.tagName === "OPTION" ? (target as HTMLOptionElement).closest("select") : null; |
| 146 | if (!select) return { ok: false, reason: "element is not a <select>" }; |
| 147 | if (select.disabled) return { ok: false, reason: "select is disabled" }; |
| 148 | const wanted = input.options.length ? input.options : target.tagName === "OPTION" ? [(target as HTMLOptionElement).value] : []; |
| 149 | const matches = [...select.options].filter((option) => wanted.includes(option.value) || wanted.includes(option.label) || wanted.includes(option.text.trim())); |
| 150 | if (matches.length === 0) return { ok: false, reason: "no option matches the requested values" }; |
| 151 | const chosen = select.multiple ? matches : [matches[0]]; |
| 152 | for (const option of select.options) option.selected = chosen.includes(option); |
| 153 | select.dispatchEvent(new Event("input", { bubbles: true })); |
| 154 | select.dispatchEvent(new Event("change", { bubbles: true })); |
| 155 | return { ok: true, selected: chosen.map((option) => option.value) }; |
| 156 | } |
| 157 | |
| 158 | export function pageFocus(input: RefInput): boolean { |
| 159 | const registry = (window as unknown as Record<string, unknown>)[input.key] as Registry | undefined; |
| 160 | if (!registry || registry.docId !== input.docId || registry.snapshotId !== input.snapshotId) return false; |
| 161 | const target = registry.refs.get(input.ref); |
| 162 | if (!target || !target.isConnected) return false; |
| 163 | (target as HTMLElement).focus({ preventScroll: true }); |
| 164 | return document.activeElement === target; |
| 165 | } |
| 166 | |
| 167 | export type LocateOutput = { ok: true; tag: string; type: string; path: string } | ResolveFailure; |
| 168 | |
| 169 | // Locates a ref without visibility checks: uploads target hidden file inputs |
| 170 | // and the CSS path lets the DevTools protocol find the same node. |
| 171 | export function pageLocate(input: RefInput): LocateOutput { |
| 172 | const registry = (window as unknown as Record<string, unknown>)[input.key] as Registry | undefined; |
| 173 | if (!registry || registry.docId !== input.docId || registry.snapshotId !== input.snapshotId) return { ok: false, reason: "stale" }; |
| 174 | const el = registry.refs.get(input.ref); |
| 175 | if (!el) return { ok: false, reason: "stale" }; |
| 176 | if (!el.isConnected) return { ok: false, reason: "element is no longer in the document" }; |
| 177 | const path: string[] = []; |
| 178 | let current: Element | null = el; |
| 179 | while (current && current !== document.documentElement) { |
| 180 | const parent: Element | null = current.parentElement; |
| 181 | if (!parent) break; |
| 182 | const index = [...parent.children].indexOf(current) + 1; |
| 183 | path.unshift(`${current.tagName.toLowerCase()}:nth-child(${index})`); |
| 184 | current = parent; |
| 185 | } |
| 186 | const tag = el.tagName.toLowerCase(); |
| 187 | return { ok: true, tag, type: tag === "input" ? (el as HTMLInputElement).type.toLowerCase() : "", path: path.length ? `html > ${path.join(" > ")}` : "html" }; |
| 188 | } |
| 189 | |
| 190 | export interface IdentityInput { |
| 191 | key: string; |
| 192 | docId: string; |
| 193 | } |
| 194 | |
| 195 | export function pageIdentity(input: IdentityInput): boolean { |
| 196 | const registry = (window as unknown as Record<string, unknown>)[input.key] as Registry | undefined; |
| 197 | return Boolean(registry) && registry?.docId === input.docId; |
| 198 | } |
| 199 |